Anyone know or able to measure the weight of a 6.9 piston? Faced with a rebuild, would one be well advised to souce custom hi compression pistons made from lighter high strength modern materials? Would such a mod allow a M100 to rev higher and more quickly?? I remember reading a while ago about max piston speed that MB engineers were faced with during 6.9 development. Obviously they were concerned about durability and the pistons not coming apart but with that comes increased weight. Was the weight the main factor in the rev limit?

I heard 6.9 pistons also have an iron band for a reason unknown to me. Has tech & materials come far enough now that there's a better alternative to standard pistons?

I'm thinking of changing pistons in the future on an Aussie engine, but retaining stock rods.

Have it somewhere . Old pistons are sitting in my brothers garage in Perth. But they are attached to the rods. From memory they were close to 900grams where quiet heavy forged pistons rods are beefy as well. Only other person I know with them sitting around out off engine has a few in W.A